Historical weather data, all-time temperature records, and monthly climate averages for Antioch, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Antioch typically lands right in the sweet spot of spring, with average highs of 70° and lows near 47°. Historically, the date has swung hard in both directions — hitting 88° back in 1961 and dipping to a frosty 35° in 1964. There's only a 14% chance of rain today, so odds are good you won't need an umbrella.
Antioch is no stranger to extremes — this inland Delta city baked to a scorching 117° on June 17, 1961, one of the highest temperatures ever recorded in the region. On the other end, a December freeze in 1972 dropped temperatures to just 18°. A single October storm in 1962 dumped over 3 inches of rain in one day, a reminder that fall arrivals here can hit hard.
Antioch runs hot in summer and mild in winter, with highs climbing from 55° in January to a peak of 92° during the week of July 9–15. If you're avoiding the heat, late fall through early spring is your window — but bring rain gear in February, the wettest stretch of the year. Summers are reliably dry and scorching, making spring and fall the most comfortable seasons to visit.